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| 1 // Copyright 2013 The Chromium Authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. |
| 4 |
| 5 #include "base/file_util.h" |
| 6 #include "chrome/browser/extensions/api/image_writer_private/destroy_partitions_
operation.h" |
| 7 #include "chrome/browser/extensions/api/image_writer_private/error_messages.h" |
| 8 |
| 9 namespace extensions { |
| 10 namespace image_writer { |
| 11 |
| 12 // Number of bytes for the maximum partition table size. By wiping this many |
| 13 // bytes we can essentially guarantee the header and associated information will |
| 14 // be wiped. See http://crbug.com/328246 for more information. |
| 15 const int kPartitionTableSize = 1 * 1024; |
| 16 |
| 17 DestroyPartitionsOperation::DestroyPartitionsOperation( |
| 18 base::WeakPtr<OperationManager> manager, |
| 19 const ExtensionId& extension_id, |
| 20 const std::string& storage_unit_id) |
| 21 : Operation(manager, extension_id, storage_unit_id) { |
| 22 verify_write_ = false; |
| 23 } |
| 24 |
| 25 DestroyPartitionsOperation::~DestroyPartitionsOperation() {} |
| 26 |
| 27 void DestroyPartitionsOperation::Start() { |
| 28 if (!temp_dir_.CreateUniqueTempDir()) { |
| 29 Error(error::kTempDirError); |
| 30 return; |
| 31 } |
| 32 |
| 33 if (!base::CreateTemporaryFileInDir(temp_dir_.path(), &image_path_)) { |
| 34 Error(error::kTempFileError); |
| 35 return; |
| 36 } |
| 37 |
| 38 scoped_ptr<char[]> buffer(new char[kPartitionTableSize]); |
| 39 memset(buffer.get(), 0, kPartitionTableSize); |
| 40 |
| 41 if (file_util::WriteFile(image_path_, buffer.get(), kPartitionTableSize) != |
| 42 kPartitionTableSize) { |
| 43 Error(error::kTempFileError); |
| 44 return; |
| 45 } |
| 46 |
| 47 WriteStart(); |
| 48 } |
| 49 |
| 50 } // namespace image_writer |
| 51 } // namespace extensions |
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